Hi, On 4 Aug 2013, at 01:17, Felipe Contreras <felipe.contreras@xxxxxxxxx> wrote: > On Sat, Aug 3, 2013 at 11:36 AM, Jörn Hees <dev@xxxxxxxxxxxx> wrote: > >> it seems that if you use the 1.8.3.4 remote-helpers/git-remote-hg to clone a mercurial repo the timezone information of commits gets transformed into your current timezone. >> (command: git clone hg::…) >> >> I noticed this when a colleague in another timezone used Kiln to also export the same mercurial repo that i had cloned from git before. >> Fetching from his git repo gives me a "second root tree" with all commits duplicated. >> A git show of two equivalent commit reveals that the Date: line of the commits changed. >> Tracking this back into the original mercurial repo reveals that _his_ times are correct. >> >> This will also make two or more clones from different timezones all using the same hg remote repo incompatible! >> >> >> Example: >> Original mercurial commit (timezone: -7200 = -4h) >> https://bitbucket.org/lipis/gae-init/commits/a43078f90e727a13767cf14c740157763fb423b5/raw/ sorry, i feel stupid for this now… this obviously is -2h: 2*60*60… not 4 (but see below) >> Lipis git export via Kiln: (-4h) >> https://github.com/lipis/gae-init/commit/36b7cabf03fbba784cc41b63430433e9fc79ca8c so is this: it should've said -2h >> My export via git clone hg::ssh://hg@xxxxxxxxxxxxx/lipis/gae-init (+2h) >> https://github.com/joernhees/git-hg-remote-bug_gae-init/commit/8341bf10f1f0a7a924717a8a2c1770f61acd51ae this one was correct: +2h > Actually our version is the correct one: > > % hg commit -m one -d "2012-04-28 11:28 +0200" > % hg export > # HG changeset patch > # User Felipe Contreras <felipe.contreras@xxxxxxxxx> > # Date 1335605280 -7200 > # Sat Apr 28 11:28:00 2012 +0200 Thanks for clarifying this. I had falsely assumed that no one would dare to flip the sign of the timezone spec. Turns out that mercurial commits contain the _negative_ timezone offset in seconds, so UTC+2 will actually be saved as -7200! I was actually still doubtful so i searched for some credible ref and was able to find this insanity documented in "hg help dates": > - "1165432709 0" (Wed Dec 6 13:18:29 2006 UTC) > > This is the internal representation format for dates. The first number is > the number of seconds since the epoch (1970-01-01 00:00 UTC). The second > is the offset of the local timezone, in seconds west of UTC (negative if > the timezone is east of UTC). I use the word insane here, as there are many standards for date times, but not one dares to switch the timezone sign! https://en.wikipedia.org/wiki/Time_zone https://upload.wikimedia.org/wikipedia/commons/a/ad/Standard_time_zones_of_the_world.png I'm sorry for reporting this as a bug and instead have to pull my hat. Cheers, Jörn -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
